{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:I2PWWSGHZDFMEDM4KPV7WHDTVA","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1b78eb016640504b4fda2c44a047bf1a791eb209a7e1bac093186ee67e8f9d88","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-07T19:00:05Z","title_canon_sha256":"9b05201c87cad0ab1e7fd5166bbba30bcfa5f223dd71e7caed0ae8b98f1fb112"},"schema_version":"1.0","source":{"id":"1901.02021","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02021","created_at":"2026-05-17T23:54:15Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02021v1","created_at":"2026-05-17T23:54:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02021","created_at":"2026-05-17T23:54:15Z"},{"alias_kind":"pith_short_12","alias_value":"I2PWWSGHZDFM","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"I2PWWSGHZDFMEDM4","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"I2PWWSGH","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:747ee0fa46ee7aa43176daf633ccf5058afee8233ab45a30ee71283ecefd1085","target":"graph","created_at":"2026-05-17T23:54:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We run self-consistent simulations of Milky Way-sized, isolated disk galaxies to study formation and evolution of a stellar bar as well as a nuclear ring in the presence of gas. We consider two sets of models with cold or warm disks that differ in the radial velocity dispersions, and vary the gas fraction $f_{\\rm gas}$ by fixing the total disk mass. A bar forms earlier and more strongly in the cold disks with larger $f_{\\rm gas}$, while gas progressively delays the bar formation in the warm disks . The bar formation enhances a central mass concentration which in turn makes the bar decay tempor","authors_text":"Cheongho Han, Pei-Ying Hsieh, Phil F. Hopkins, SungWon Kwak, Woong-Tae Kim, Woo-Young Seo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-07T19:00:05Z","title":"Effects of Gas on Formation and Evolution of Stellar Bars and Nuclear Rings in Disk Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02021","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:39d0916b05dac1c84ed3b37ed25c7d6c9e1aace0451520769d4d38fd387deab4","target":"record","created_at":"2026-05-17T23:54:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1b78eb016640504b4fda2c44a047bf1a791eb209a7e1bac093186ee67e8f9d88","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-07T19:00:05Z","title_canon_sha256":"9b05201c87cad0ab1e7fd5166bbba30bcfa5f223dd71e7caed0ae8b98f1fb112"},"schema_version":"1.0","source":{"id":"1901.02021","kind":"arxiv","version":1}},"canonical_sha256":"469f6b48c7c8cac20d9c53ebfb1c73a80e1fae203c7f33cab78f93703bcf7785","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"469f6b48c7c8cac20d9c53ebfb1c73a80e1fae203c7f33cab78f93703bcf7785","first_computed_at":"2026-05-17T23:54:15.335029Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:15.335029Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rtNiKi57sQgHB7N+EN0qH4NxKfxLEuWQF3t6wcqhjOmoFXoNhUl5/2jwi0UPJUAQ+Vqm4lO2x+q4/ZWX1LzbBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:15.335477Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.02021","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39d0916b05dac1c84ed3b37ed25c7d6c9e1aace0451520769d4d38fd387deab4","sha256:747ee0fa46ee7aa43176daf633ccf5058afee8233ab45a30ee71283ecefd1085"],"state_sha256":"b060115e1b3e171c7f147fb6bc0eb1f0954552f2ccf4955452ce825336445f8a"}